« on: December 10, 2012, 11:36:49 PM »
OK so I have ben building on my Custom M4 for a while now. Im gunna give you a list of all my parts, maybe you can see something I cant.
Base gun is an older CA ar15-a1. For the Metal body.
Gear box: KWA: PDW Version 2 reinforced 7mm shell. with 7mm ball barrings.
Gears: SHS 13:1 high speed.
Piston: SHS pollycarb piston with metal teath.
(the sector gear has ben short stroked by 2 teeth; also pulling a m115-120 spring, its fairly old so its probably about as strong as a new m110 or so)
Motor: Matrix Turbo.
RPS: 35-40 on a Rihno 11.1v 30-35c
Now the Problem. I have gone through at least 5 pinion gears. From old chinese motor ones. (thought I just had a bad casting from factory on the turnbo) To even an harden steal gear lasting about only 5,000rnds, each. I've wanted to try a Seigtech gear but he only makes the O-type gears. The Matrix Turbo/Magnum have D-shaped motor shafts.
I thought that maybe it was the lash (motor height) that was messing up the gears. But from the 2nd-5th gear It looks like and sounds like the lash is just purfect.
Can some one help on this? and am i the only one haveing this problem?